Stackable tray



FIG. 1 is an upper perspective view of a stackable tray;

FIG. 2 is a lower perspective view thereof; showing the stackable tray in the reverse position;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a rear end view thereof;

FIG. 8 is a front end view thereof; and,

FIG. 9 is a left side cross-sectional view of FIG. 3.

The broken lines showing is included for the purpose of illustrating environment and forms no part of the claimed design. 

The ornamental design for a stackable tray, as shown and described. 